UltraStar Deluxe is a free and open source karaoke game inspired by the Singstar™ game available on the Playstation®. It allows up to six players to sing along with music using microphones in order to score points, depending on the pitch of the voice and the rhythm of singing.

Ultratools – Editor is a open source editor for ultrastar songs. you can edit song intuitively and create song very easily!!

If you want to contribute to the project you are welcome!!

Official website

Playstation®